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What is a MapReduce Combiner?


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More MapReduce Interview Questions

What is a "reducer" in Hadoop?

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In mapreduce what is a scarce system resource? Explain?

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Define MapReduce?

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how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

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What do you mean by data locality?

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what are the basic parameters of a Mapper?

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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

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What is the inputsplit in map reduce software?

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What is Combiner in MapReduce?

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What is the difference between Reducer and Combiner in Hadoop MapReduce?

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Why Hadoop MapReduce?

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What is an identity mapper and identity reducer?

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